Elizabeth had an even closer personal bond with the house of Holstein. At seventeen, she had been betrothed to Johanna’s older brother, Charles Augustus. In 1726, this Holstein prince had traveled to St. Petersburg to be married, but a few weeks before the wedding, the prospective bridegroom had caught smallpox in the Russian capital and died there. Elizabeth was left with a grief she never entirely overcame, and thereafter she regarded the house of Holstein as almost a part of her own family.
Now, when the news arrived that this same Elizabeth had suddenly ascended the Russian throne, Johanna immediately wrote to congratulate the new empress, who, at one time, had been about to become her sister-in-law. Elizabeth’s reply was amiable and affectionate. The relationship continued to prosper. Johanna had in her possession a portrait of Elizabeth’s dead sister, Anne, which the empress wanted. When Elizabeth wrote to her “dear niece” and asked whether the picture might be returned to Russia, Johanna was overjoyed to do this favor. Soon after, a secretary from the Russian embassy in Berlin arrived in Stettin bringing Johanna a miniature portrait of Elizabeth set in a magnificent frame of diamonds worth eighteen thousand rubles.
Determined to nurture this promising connection, Johanna took her daughter to Berlin, where the Prussian court painter Antoine Pesne painted a portrait of Sophia to be sent as a gift to the empress. The portrait was unremarkable; the subjects of most of Pesne’s paintings wound up on his canvases looking almost identical, and his portrait of Sophia emerged as a generic eighteenth-century portrait of a pleasant young woman. Nevertheless, once the likeness had been dispatched to St. Petersburg, the desired response came back: “The empress is charmed by the expressive features of the young princess.”
Thereafter, Johanna passed up no opportunity to forge new links in this family chain. At the end of 1742, she gave birth to a second daughter, Sophia’s only sister. As soon as the infant’s gender was known, Johanna wrote to the empress, saying that the child was to be named Elizabeth and asking Her Majesty to consent to act as the baby’s godmother. Elizabeth agreed and soon another portrait of the empress, again set in diamonds, arrived in Stettin.
Meanwhile, another series of events favorable to Johanna was taking place. In January 1742, young Peter Ulrich of Holstein, the orphaned boy whom Sophia had met three years before, suddenly disappeared from Kiel and reappeared in St. Petersburg, where he was adopted by his aunt Elizabeth and proclaimed heir to the Russian throne. This boy, now a future emperor of Russia, was Johanna’s cousin (and, by extension, Sophia’s). In 1743, there was another wonderful surprise for Johanna. As a condition of Peter Ulrich’s becoming heir to the Russian throne, the little Holstein prince renounced his claim to the crown of Sweden. By the terms of a treaty concluded between Russia and Sweden, Empress Elizabeth was permitted to designate her nephew’s replacement as heir to the Swedish throne. She chose Johanna’s brother, Adolphus Frederick, Prince-Bishop of Lübeck, who had been Peter Ulrich’s guardian. Thus it was that when all these proclamations, changes, and replacements were in place, Johanna found herself at the center of a wheel of astonishing good fortune. She had lost to smallpox a brother who would have been the consort of the new Russian empress, but now she possessed a cousin who would one day be the Russian emperor and a living elder brother who would become the king of Sweden.
As his wife was courting St. Petersburg and escorting their daughter through north Germany, Prince Christian Augustus, husband and father, remained at home. Now over fifty, unchanging in his disciplined, frugal way of life, he survived a temporary paralytic stroke, recovered, and lived to see his own rank and status improve. In July 1742, the new king of Prussia, Frederick II, promoted him to the rank of field marshal in the Prussian army. In November of the same year, the prince and his elder brother succeeded to joint sovereignty of the little principality of Anhalt-Zerbst, a town southwest of Berlin with medieval walls and towers, a moat, and gabled houses. Resigning from the army and leaving Stettin, Christian Augustus moved his family to Zerbst and devoted himself to the welfare of his twenty thousand subjects. Johanna was mildly pleased; now she was a reigning princess of a small—very small—sovereign German state. She lived in a small—very small—baroque palace. Despite her correspondence with an empress and her visits to her well-placed relatives, she still worried that life was passing her by.